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United States Patent | 6,249,733 |
Smith | June 19, 2001 |
An automatic control for operating an engine retarder, service brakes, and an automatic transmission associated with earth moving equipment is provided. The automatic control monitors engine speed and responsively produces control signals to maintain engine speed within predetermined limits.
Inventors: | Smith; Jerry F. (Clinton, IL) |
Assignee: | Caterpillar Inc. (Peoria, IL) |
Appl. No.: | 324293 |
Filed: | June 2, 1999 |
Current U.S. Class: | 701/50; 475/118; 477/71; 477/92; 477/183; 477/185; 477/205; 701/53 |
Intern'l Class: | G06F 007/70 |
Field of Search: | 701/50,53,61,66,70 477/71,78,91,124,173,200,118,146,144,161,109,92,107,111,86,182-187,205-209 475/116,109,118,121-122 303/139,174 188/2 R,4 B,140 A 192/3.23,3.3,3.25,216,3.34,13 R 74/733.1,339,335,336 R,478,480 R |
Re36007 | Dec., 1998 | White et al. | 477/91. |
3931870 | Jan., 1976 | Memmer | 188/296. |
4050556 | Sep., 1977 | Forster et al. | 477/182. |
4108269 | Aug., 1978 | Nakao | 180/168. |
4753134 | Jun., 1988 | Hayasaki | 477/119. |
5270934 | Dec., 1993 | Kobayashi | 701/95. |
5409432 | Apr., 1995 | Steeby | 477/71. |
5537975 | Jul., 1996 | Cosma et al. | 123/322. |
5830105 | Nov., 1998 | Iizuka | 477/92. |
5910069 | Jun., 1999 | Markyvech | 477/109. |
6079622 | Jun., 2000 | Chakraborty et al. | 180/169. |